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प्रश्न
How are colloids classified on the basis of Interaction between dispersed phase and dispersion medium?
उत्तर १
On the basis of the nature of the interaction between the dispersed phase and dispersion medium, the colloids can be classified as lyophilic (solvent attracting) and lyophobic (solvent repelling).
उत्तर २
(a) Lyophillic colloids (solvent loving) are those substances that directly pass into the colloidal state when brought in contact with the solvent, e.g., proteins, starch, rubber, etc.
These sols are quite stable because of the strong attractive forces between the particles of dispersed phase and dispersion medium.
(b) Lyophobic colloids (solvent hating) are those substances that do not form the colloidal sol readily when mixed with the dispersion medium.
These sols are less stable than the lyophilic sols.
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संबंधित प्रश्न
What are lyophilic and lyophobic colloids ? Which of these sols can be easily coagulated on the addition of small amounts of electrolytes?
Write a method by which lyophobic colloids can be coagulated.
Out of sulphur sol and proteins, which one form multimolecular colloids?
Give reasons for the following observations: Lyophilic sol is more stable than lyophobic sol.
How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium?
What are lyophilic and lyophobic sols? Give one example of each type. Why are hydrophobic sols easily coagulated?
How are colloids classified on the basis of Nature of dispersion medium
Which of the following interface cannot be obtained?
Method by which lyophobic sol can be protected?
Which of the following colloids cannot be coagulated easily?
(i) Lyophobic colloids.
(ii) Irreversible colloids.
(iii) Reversible colloids.
(iv) Lyophilic colloids.
Match the items given in Column I and Column II.
| Column I | Column II |
| (i) Protective colloid | (a) \[\ce{FeCl3 + NaOH}\] |
| (ii) Liquid-liquid colloid | (b) Lyophilic colloids |
| (iii) Positively charged colloid | (c) Emulsion |
| (iv) Negatively charged colloid | (d) \[\ce{FeCl3}\] + hot water |
Differentiate between the following:
Lyophobic Sol and Lyophilic Sol
